They’re just banning accounts, not even access in a lot of cases, and jeebus other technologies exist. IRC and XMPP aren’t going away ever
I’m not saying that I’d like to have to use this but if push comes to shove: encrypt your plain-text with aes256.
Example text:
FKZOMTF39EgMbw+Zdzqr1zEIpW6iCQBy7IfxZLHcmTzhqmpMgwdOdZhD30JrY89yPassword: 1234
Decrypted text: test
What PBKDF did you use and how is the IV included with the ciphertext?
Used the programme “DroidCrypt” from F-Droid.
DroidCrypt uses scrypt with N=32768 r=16 p=4 as PBKDF, and AES-256 in GCM mode with tag-length of 128 bits. The ciphertext is output as:
+------------------------+-----------------------+------------------------- | scrypt salt (16 bytes) | AES-GCM IV (12 bytes) | ciphertext (N bytes) ... +------------------------+-----------------------+-------------------------and base64 encoded.
Your recipient would need to know all of these details to be able to decrypt the text (or use the same app) which is why cryptography is a bit more complicated than just “encrypt it with aes256.”
Maybe we should start writing letters again? Maybe put an encrypted usb-stick or a memory card into an envelope and mail it?